Methods and apparatuses for configuring a control region

Abstract

A method for configuring a control region, performed by a base station working on an unlicensed spectrum, includes: determining one or more channel detection subbands for configuring the control region; generating control region configuration information corresponding to the one or more channel detection subbands; and transmitting the control region configuration information to a terminal to perform a corresponding control signaling detection based on the control region configuration information.

What is claimed is: 
     
       1. A method of configuring a control region, performed by a base station working on an unlicensed spectrum, comprising:
 determining one or more channel detection subbands for configuring the control region; 
 performing a channel detection for the one or more channel detection subbands to obtain a first channel detection result; 
 adding the first channel detection result into control region configuration information that is generated corresponding to the one or more channel detection subbands; 
 configuring one or more sets of physical downlink control channel (PDCCH) candidates corresponding to the one or more channel detection subbands, wherein
 each set of PDCCH candidates, in which characteristics are identical, is limited on one of the one or more channel detection subbands, and 
 the sets of PDCCH candidates, between which the characteristics are different, correspond to different channel detection subbands; 
 wherein the characteristic comprises at least one of an aggregation level or a downlink control information (DCI) type to be detected; 
 
 generating second indication information for representing the one or more sets of PDCCH candidates; 
 adding the second indication information into the control region configuration information; 
 configuring a designated control resource set (CORESET) and a designated search space for a terminal, wherein the designated CORESET is to be mapped on all or a part of the one or more channel detection subbands, and the designated search space covers the one or more sets of PDCCH candidates with the various characteristics; 
 transmitting the designated CORESET and the designated search space to the terminal through high layer signaling; and 
 transmitting the control region configuration information to the terminal to perform a corresponding control signaling detection based on the control region configuration information. 
 
     
     
       2. The method according to  claim 1 , further comprising:
 acquiring a correspondence between pre-defined channel detection results for the one or more channel detection subbands and pre-defined control resource set (CORESET) configurations, wherein the channel detection result comprises that the channel detection for each of the one or more channel detection subbands is successful or failed; and 
 transmitting the correspondence to the terminal to determine a first CORESET configuration corresponding to the first channel detection result based on the correspondence. 
 
     
     
       3. The method according to  claim 1 , further comprising:
 acquiring a correspondence between pre-defined channel detection results for the one or more channel detection subbands and pre-defined control resource set (CORESET) configurations, wherein the channel detection result comprises that a channel detection for each of the one or more channel detection subbands is successful or failed; and 
 adding the correspondence into the control region configuration information. 
 
     
     
       4. The method according to  claim 1 , further comprising:
 configuring one or more search spaces corresponding to the one or more channel detection subbands, wherein
 each of the one or more search spaces is limited on one of the one or more channel detection subbands, and 
 different search spaces correspond to different channel detection subbands; 
 
 generating first indication information for representing the one or more search spaces; and 
 adding the first indication information into the control region configuration information. 
 
     
     
       5. The method according to  claim 4 , further comprising:
 configuring a designated control resource set (CORESET) for the terminal, wherein the designated CORESET is to be mapped on all or a part of the one or more channel detection subbands; and 
 transmitting the designated CORESET to the terminal through high layer signaling. 
 
     
     
       6. A method of configuring a control region, performed by a terminal working on an unlicensed spectrum, comprising:
 receiving control region configuration information from a base station, wherein the control region configuration information is generated by the base station for one or more channel detection subbands for configuring the control region; 
 wherein the control region configuration information comprises a first channel detection result obtained from a channel detection performed by the base station for the one or more channel detection subbands; 
 wherein the control region configuration information further comprises second indication information about one or more sets of physical downlink control channel, PDCCH, candidates configured by the base station for the one or more channel detection subbands, wherein
 each set of PDCCH candidates, in which characteristics are identical, is limited on one of the one or more channel detection subbands, and 
 the sets of PDCCH candidates, between which the characteristics are different, correspond to different channel detection subbands; 
 wherein the characteristic comprises at least one of an aggregation level or a downlink control information (DCI) type to be detected; 
 
 acquiring a designated control resource set (CORESET) and a designated search space that are pre-configured by the base station for the terminal, wherein the designated CORESET is to be mapped on all or a part of the one or more channel detection subbands, and the designated search space covers the one or more sets of PDCCH candidates with the various characteristics; 
 determining, among all or the part of the one or more channel detection subbands on which the designated CORESET is mapped, a channel detection result that a channel detection for a second channel detection subband is successful; 
 determining a first characteristic of the set of PDCCH candidates corresponding to the second channel detection subband based on the control region configuration information; and 
 detecting, in a part of the designated search space that is on the second channel detection subband, the set of PDCCH candidates with the first characteristic corresponding to the second channel detection subband. 
 
     
     
       7. The method according to  claim 6 , further comprising:
 receiving, from the base station, a correspondence between pre-defined channel detection results for the one or more channel detection subbands and pre-defined control resource set (CORESET) configurations, wherein the channel detection result comprises that the channel detection for each of the one or more channel detection subbands is successful or failed; 
 determining a first CORESET configuration corresponding to the first channel detection result based on the correspondence; and 
 performing the control signaling detection based on the first CORESET configuration. 
 
     
     
       8. The method according to  claim 6 ,
 wherein the control region configuration information further comprises: a correspondence between pre-defined channel detection results for the one or more channel detection subbands and pre-defined control resource set (CORESET) configurations, wherein the channel detection result comprises that a channel detection for each of the one or more channel detection subbands is successful or failed; and 
 wherein the method further comprises:
 performing the channel detection for the one or more channel detection subbands to obtain a second channel detection result; 
 determining a second CORESET configuration corresponding to the second channel detection result based on the correspondence; and 
 performing the control signaling detection based on the second CORESET configuration. 
 
 
     
     
       9. The method according to  claim 6 ,
 wherein the control region configuration information further comprises first indication information about one or more search spaces configured by the base station for the one or more channel detection subbands, wherein
 each of the one or more search spaces is limited on one of the one or more channel detection subbands, and 
 different search spaces correspond to different channel detection subbands; and 
 
 wherein the method further comprises:
 performing the control signaling detection in the one or more search spaces corresponding to the one or more channel detection subbands. 
 
 
     
     
       10. The method according to  claim 9 , wherein said performing the control signaling detection in the one or more search spaces corresponding to the one or more channel detection subbands comprises:
 acquiring a designated control resource set (CORESET) pre-configured by the base station for the terminal, wherein the designated CORESET is to be mapped on all or a part of the one or more channel detection subbands; 
 determining, among all or the part of the one or more channel detection subbands on which the designated CORESET is mapped, a channel detection result that a channel detection for a first channel detection subband is successful; 
 determining the search space corresponding to the first channel detection subband based on the control region configuration information; and 
 performing the control signaling detection in the search space corresponding to the first channel detection subband. 
 
     
     
       11. An apparatus for configuring a control region, configured in a base station working on an unlicensed spectrum, comprising:
 one or more processors; and 
 a memory for storing instructions executable by the one or more processors; 
 wherein the one or more processors are configured to:
 determine one or more channel detection subbands for configuring the control region; 
 perform a channel detection for the one or more channel detection subbands to obtain a first channel detection result; 
 add the first channel detection result into control region configuration information that is generated corresponding to the one or more channel detection subbands; 
 configure one or more sets of physical downlink control channel (PDCCH) candidates corresponding to the one or more channel detection subbands, wherein
 each set of PDCCH candidates, in which characteristics are identical, is limited on one of the one or more channel detection subbands, and 
 the sets of PDCCH candidates, between which the characteristics are different, correspond to different channel detection subbands; 
 wherein the characteristic comprises at least one of an aggregation level or a downlink control information (DCI) type to be detected; 
 
 generate second indication information for representing the one or more sets of PDCCH candidates; 
 add the second indication information into the control region configuration information; 
 configure a designated control resource set (CORESET) and a designated search space for a terminal, wherein the designated CORESET is to be mapped on all or a part of the one or more channel detection subbands, and the designated search space covers the one or more sets of PDCCH candidates with the various characteristics; and 
 transmit the designated CORESET and the designated search space to the terminal through high layer signaling; and 
 transmit the control region configuration information to the terminal to perform a corresponding control signaling detection based on the control region configuration information. 
 
 
     
     
       12. An apparatus implementing the method according to  claim 6 , configured in a terminal working on an unlicensed spectrum, comprising:
 one or more processors; and 
 a memory for storing instructions executable by the one or more processors; 
 wherein the one or more processors are configured to:
 receive control region configuration information from a base station, wherein the control region configuration information is generated by the base station for one or more channel detection subbands for configuring the control region; 
 wherein the control region configuration information comprises a first channel detection result obtained from a channel detection performed by the base station for the one or more channel detection subbands; 
 wherein the control region configuration information further comprises second indication information about one or more sets of physical downlink control channel, PDCCH, candidates configured by the base station for the one or more channel detection subbands, wherein
 each set of PDCCH candidates, in which characteristics are identical, is limited on one of the one or more channel detection subbands, and 
 the sets of PDCCH candidates, between which the characteristics are different, correspond to different channel detection subbands; 
 wherein the characteristic comprises at least one of an aggregation level or a downlink control information (DCI) type to be detected; 
 
 acquire a designated control resource set (CORESET) and a designated search space that are pre-configured by the base station for the terminal, wherein the designated CORESET is to be mapped on all or a part of the one or more channel detection subbands, and the designated search space covers the one or more sets of PDCCH candidates with the various characteristics; 
 determine, among all or the part of the one or more channel detection subbands on which the designated CORESET is mapped, a channel detection result that a channel detection for a second channel detection subband is successful; 
 determine a first characteristic of the set of PDCCH candidates corresponding to the second channel detection subband based on the control region configuration information; and 
 detect, in a part of the designated search space that is on the second channel detection subband, the set of PDCCH candidates with the first characteristic corresponding to the second channel detection subband. 
 
 
     
     
       13. A communication system implementing the method according to  claim 1 , comprising the base station, wherein base station is configured to, after said determining one or more channel detection subbands for configuring the control region:
 perform a channel detection for the one or more channel detection subbands to obtain a first channel detection result; 
 add the first channel detection result into control region configuration information that is generated corresponding to the one or more channel detection subbands; 
 configure one or more sets of physical downlink control channel (PDCCH) candidates corresponding to the one or more channel detection subbands, wherein
 each set of PDCCH candidates, in which characteristics are identical, is limited on one of the one or more channel detection subbands, and 
 the sets of PDCCH candidates, between which the characteristics are different, correspond to different channel detection subbands; 
 wherein the characteristic comprises at least one of an aggregation level or a downlink control information (DCI) type to be detected; 
 
 generate second indication information for representing the one or more sets of PDCCH candidates; 
 add the second indication information into the control region configuration information; 
 configure a designated control resource set (CORESET) and a designated search space for a terminal, wherein the designated CORESET is to be mapped on all or a part of the one or more channel detection subbands, and the designated search space covers the one or more sets of PDCCH candidates with the various characteristics; 
 transmit the designated CORESET and the designated search space to the terminal through high layer signaling; and 
 transmit the control region configuration information to the terminal, to thereby enable the terminal performing the corresponding control signaling detection. 
 
     
     
       14. The communication system according to  claim 13 , further comprising the terminal, wherein the terminal is configured to perform the corresponding control signaling detection based on the control region configuration information, thereby ensuring that a physical downlink control channel (PDCCH) is transmitted without crossing different channel detection subbands, and improving a transmission reliability of control signaling:
 wherein performing the corresponding control signaling detection based on the control region configuration information comprises: 
 acquiring the designated control resource set (CORESET) and the designated search space that are pre-configured by the base station for the terminal; 
 determining, among all or the part of the one or more channel detection subbands on which the designated CORESET is mapped, a channel detection result that a channel detection for a second channel detection subband is successful; 
 determining a first characteristic of the set of PDCCH candidates corresponding to the second channel detection subband based on the control region configuration information; and 
 detecting, in a part of the designated search space that is on the second channel detection subband, the set of PDCCH candidates with the first characteristic corresponding to the second channel detection subband.